685040946912 has 216 divisors, whose sum is σ = 2314357901856. Its totient is φ = 191561416704.

The previous prime is 685040946851. The next prime is 685040946917. The reversal of 685040946912 is 219649040586.

685040946912 is a `hidden beast` number, since 6 + 8 + 504 + 0 + 9 + 46 + 91 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685040946917) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 146848 + ... + 1179680.

It is an arithmetic number, because the mean of its divisors is an integer number (10714619916).

Almost surely, 2^685040946912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685040946912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157178950928).

685040946912 is an abundant number, since it is smaller than the sum of its proper divisors (1629316954944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685040946912 is a wasteful number, since it uses less digits than its factorization.

685040946912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032910 (or 1032892 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 685040946912 in words is "six hundred eighty-five billion, forty million, nine hundred forty-six thousand, nine hundred twelve".